Snakes partition their body to traverse large steps stably

Area of Science:

• Biomechanics
• Animal Locomotion
• Robotics

Background:

• Snake locomotion studies primarily focus on flat surfaces, neglecting complex 3D environments.
• Real-world snake habitats involve challenging terrain like rocks, trees, and variable surfaces.

Purpose of the Study:

• To investigate how terrestrial snakes traverse complex 3D terrain, specifically large steps with varying friction and height.
• To understand the body partitioning and gait adjustments snakes employ for stability and propulsion.

Main Methods:

• Studied the locomotion of the variable kingsnake on a large step with controlled variations in height and surface friction.
• Analyzed body partitioning, movement patterns, and stability during step traversal.

Main Results:

• Snakes partitioned their bodies into three functional sections: two for propulsion on horizontal surfaces and one for bridging the vertical gap.
• The gait adapted to step height and friction, with reduced speed and altered movement patterns (oscillatory with slip) on lower friction surfaces.
• Body partitioning ensured stability throughout the traversal, even during the initial cantilevering phase.

Conclusions:

• A partitioned gait is a key adaptation for snakes navigating complex 3D terrain.
• This adaptable locomotion strategy allows snakes to maintain stability and progress across challenging environments.
• Findings have implications for understanding snake movement and potentially for developing bio-inspired robots.